CN104215333B - Two dimension formula sequential type colorimeter detection method and this colorimeter - Google Patents
Two dimension formula sequential type colorimeter detection method and this colorimeter Download PDFInfo
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Abstract
A kind of two dimension formula sequential type colorimeter detection method, in order to analyze the color at least one determinand surface and to be converted to colourity, wherein this colorimeter has one in order to irradiate the synthesized source on above-mentioned determinand surface, an image-taking device, a control and calculation output device and a storage device；And the most above-mentioned synthesized source includes that a plurality of centre wavelength is positioned at visible-range and the different LED of mutual centre wavelength, and above-mentioned determinand surface is to be arranged on a predetermined region to be measured, this region to be measured is then divided into plural position to be measured, and this storage device stores each above-mentioned position to be measured to the reflection of each above-mentioned LED and this image-taking device entire compensation data to the response of each above-mentioned centre wavelength.
Description
Technical field
The present invention is a kind of two dimension formula sequential type colorimeter detection method and this colorimeter, especially with regard to a kind of energy accurately
The colorimeter of quantum chemical method body surface color.
Background technology
For human eye for the perception of object color, be from radiation of visible light to body surface after, by body surface
The diffused light of reflection, stimulates activation to be responsible for the cone cell of color sensitive, and photostimulation is converted to electric signal to Brodmann area
Differentiate, thus produce color perception and distinguish the color of object.Although the wave-length coverage of visible ray varies with each individual, but typically
About can contain 400～750nm.
Owing to human color perception process is relevant with light source, photographed object surface and observer's color cognition respectively, not single
Pure it is decided by photographed object, therefore when quantification objective narration the presented color of object, even if getting rid of observer more rambunctious
Become because of, it is still desirable to consider the impact that light source is caused.For getting rid of the interference factor of light source difference, the unified definition to color,
International Commission on Illumination (International Commission on Illumination, CIE) defines Several standard and shines
Phaneroplasm and standard light source, and formulated a chromaticity diagram in 1931, the color matching function formulated with CIE by the reflection light of object, pin
Different wavelength being given different weights consider, finally calculate chromatic value size, the most any color all can be in colourity
It is labeled out with chromaticity coordinates on Tu.
In practice, color measurement instrument can be divided mainly into colorimeter and spectrogrph, using CIE standard light source D as light source, front
Person is the optical filter adding before photo-sensitive cell and meeting CIE color matching function, when determinand reflection light is by color matching function optical filter
To photo-sensitive cell, through the chromaticity coordinates that can be calculated correspondence of oversampling circuit；The latter is then to utilize optical dispersion principle, in dispersion
Light rear arrange multiple photo-sensitive cells, its quantity is different according to resolution, then measures the coloured light light at visible-range
Spectral structure, then put CIE color matching function via circuit and calculate chromaticity coordinates.
Wherein, the color matching function optical filter of colorimeter is difficult to be coated with in practice on the market, and compared to CIE standard light
Source D, colorimeter provide light source and standard cannot be complied fully with, cause its chromatic value measured to there is also error, colorimeter is still
Tool improves and progressive space.
Such as TaiWan, China patent of invention the I291549th " the adjustable color formula method of chromascope ", mention a kind of by tune
The colour temperature of light source in whole chromascope, to simulate each CIE standard light source, its essential core method is to first pass through the computing of formula, meter
After needed for calculating light source, spectral intensity adds the wave frequency response of color matching function, object reflectance and light power meter, according to
The result calculated, at the light source utilizing 24 LEDs combination in any to go out to meet the above-mentioned spectral distribution calculated, but in practice
On, this kind of combined light source spectral distribution is complicated, it is impossible to reached by simple linear superposition, such as: in D65+X light source, 500nm
Neighbouring being difficult to is mated completely, and these mate bad regions is all error in measurement source, and in practice, this is not preferably solution
Method.
Therefore, how to design colour measurement accuracy high, and utilize many different center spectrum LED institutes luminous, and not
Light source must can be made to comply fully with the definition of CIE standard illuminants by complicated combination and strict screening, prior
It is, when measuring the surface color and polish of large area object, can effectively to get rid of space error, make the accuracy that measurement is the most certain,
Above each point will be the important topic manufacturing colorimeter.
Summary of the invention
One of present invention purpose is the two-dimentional formula sequential type colorimeter detection side providing a kind of color accuracy of measurement high
Method and colorimeter.
Another object of the present invention is to provide one to be not necessary to i.e. be may utilize plurality of LEDs by complicated calculations and be combined into light source
Two-dimentional formula sequential type colorimeter detection method and colorimeter.
A further object of the present invention is to provide a kind of two-dimentional formula sequential type colorimeter inspection meeting CIE standard light source specification
Survey method and colorimeter.
It is still another object of the present invention to provide and can measure large area determinand surface color and polish and get rid of the two of space error
Dimension formula sequential type colorimeter detection method and colorimeter.
According to disclosed a kind of two dimension formula sequential type colorimeter detection method, in order to analyze at least one determinand
The color on surface is also converted to colourity, wherein this colorimeter have one in order to irradiate above-mentioned determinand surface synthesized source,
One image-taking device, a control and calculation output device and a storage device；And the most above-mentioned synthesized source includes plural number
Individual centre wavelength is positioned at visible-range and the different LED of mutual centre wavelength, and above-mentioned determinand surface is to be arranged on one
Individual predetermined region to be measured, this region to be measured is then divided into plural position to be measured, and this storage device stores each above-mentioned
The entire compensation of the response of each above-mentioned centre wavelength is provided by position to be measured by reflection and this image-taking device of each above-mentioned LED
Material, this detection method comprises the following steps:
A) each LED of above-mentioned synthesized source is lighted one by one so that it is sequential keyboard encoder exposes to above-mentioned determinand surface；
B) the anti-of above-mentioned each LED illumination extremely above-mentioned determinand surface is received by above-mentioned image-taking device according to above-mentioned position to be measured
Penetrate light, and export a reflection data；And
C) by above-mentioned control and calculation output device to all above-mentioned reflection light, according to each above-mentioned position to be measured to often
Reflection data and the above-mentioned entire compensation data of one LED irradiated compensate computing, and export a corresponding colourity data.
And one two dimension formula sequential type colorimeter, in order to analyze the color at least one determinand surface and to be converted to color
Degree, this colorimeter has a confession and arranges the region predetermined to be measured on above-mentioned determinand surface, and this region to be measured includes a plurality of
Position to be measured, this colorimeter includes:
One, in order to irradiate the synthesized source on above-mentioned determinand surface, is positioned at visible-range including a plurality of centre wavelengths
And the LED that mutual centre wavelength is different；
One instructs above-mentioned LED sequential keyboard encoder and irradiates control and the calculation output device in above-mentioned region to be measured one by one；
One receives each above-mentioned position to be measured, above-mentioned determinand surface and is reflected the image-taking device of above-mentioned LED reflection light, and
Export to this control and calculation output device；And
One storage device, stores each above-mentioned position to be measured to the reflection of each above-mentioned LED and this image-taking device pair
The entire compensation data of the response of each above-mentioned centre wavelength, defeated according to above-mentioned image-taking device for this control and calculation output device
The reflection data gone out and above-mentioned entire compensation data compensate computing, and export a corresponding colourity data.
Wherein compensation operation is the key technology of the present invention, compensates content and can be divided into the compensation to position, and to synthesis
The compensation of light source, the compensation to position is by being corrected colorimeter, by a piece of standard white plate before measuring determinand
Being arranged in region to be measured, region the most to be measured can be subdivided into again multiple position to be measured, lights a plurality of LED one by one, and by taking
As device records the reflection data of the corresponding each LED in each position to be measured, then send as an envoy to each to be measured for each LED calculating
The position compensation data of position homogenization, with the known colorimeter of solution when measuring, light source or the position of determinand, and to be measured
The size on thing surface, when image-taking device captures reflection data, because of the error of different the produced measurement results of distance.
As it is shown in figure 1, first standard white plate is positioned over region to be measured by the present invention, and treating that standard white plate is contained
Survey region and be divided into a such as 3X3 matrix, and using such as one CCD element as image-taking device, then to each district in matrix
Block position CCD measures obtaining a sensing and color value.This capture result on the one hand can be with the putting position of LED at sky
Between aspect difference, such as in the middle of just brighter to light source position, situation that peripheral location is dark；Another aspect, also can be with CCD pair
The space difference of each block locations of matrix, makes received reflection data produce impact, to obtain correct sensing
Data, for the above-mentioned compensation that both must be accorded to correspondence, just can make all block locations measurement results in matrix to be all
Identical brightness and color.
Secondly as synthesized source of the present invention is to utilize to form combined by the different LED of multiple centre wavelength, fill in capture
When putting acquisition reflection data, also can have different response magnitude because of the photo-sensitive cell in image-taking device for different wavelength,
And cause the error of measurement.The most further, when brightness luminous for each LED itself and centre wavelength are as well as operation
Temperature and the factor such as aging and have the phenomenons such as luminous strong and weak difference, decay and wave length shift.The most before the actual measurement, right
Must compensate with wavelength according to its luminous intensity in each LED, obtain wavelength compensation data, according to CIE standard light
The specification in source, as compensation basis, such as, can simulate the luminous intensity of CIE standard light source D65 by multiple LED and divide with spectrum
Cloth.
Summary, obtains position compensation data and wavelength compensation data by prior correction, and compensates money by two
Material is integrated into entire compensation data, and by this entire compensation data logging in storage device, when measuring as reality, capture fills
Put and capture after reflection data, control and calculate output device to compensate the foundation of data, such as, be divided into nine grids
Determinand surface on, be irradiated with red-light LED, when image-taking device captures the reflection light of nine grids center position, control
System and calculation output device can be by entire compensation data, position, red light wavelength and the CIE color matching function to this central point
Compensate computing, and then obtain one and will not produce the measurement result of error because of determinand position and light source category, make every
Measurement once can obtain correct colourity data.
Therefore the present invention is suitable for measuring large-area determinand, meanwhile, is not necessary to carry out light source led especially the group of complexity
Close, CIE standard light source can be simulated, it is often more important that, measurement has not changed because of determinand, light source or image-taking device position
Becoming and produce error, the above is the main points that the present invention is focused on.
Accompanying drawing explanation
Fig. 1 is that known colorimeter light source irradiates distribution and capture brightness disproportionation schematic diagram.
Fig. 2 is the present invention the first preferred embodiment schematic diagram.
Fig. 3 is the first preferred embodiment schematic block diagram.
Fig. 4 is rectification building-out schematic flow sheet of the present invention.
Fig. 5 is that the first preferred embodiment measures schematic flow sheet.
Fig. 6 is second embodiment of the invention schematic diagram.
Symbol description
1 ... two dimension formula sequential type colorimeter 11 ... synthesized source
111、1111、1112、1113... LED 12 ... image-taking device
13 ... control and calculate output device
14 ... storage device 15... makes a reservation for region to be measured
151 ... position 152 to be measured ... matrix
2 ... standard white plate 3 ' ... dome-shaped reflector
4 ' ... determinand 401-407 ... step
501-504 ... step
Detailed description of the invention
For the present invention aforementioned and other technology contents, feature and effect, preferable at following cooperation Figure of description
In the detailed description of embodiment, can clearly present；Same or analogous element, will indicate with similar label.
As shown in Figure 2 and Figure 3, the present invention the first preferred embodiment, two dimension formula sequential type colorimeter 1 includes: a synthesis
Light source 11, one controls and calculates 13, image-taking device 12 of output device and storage device 14, wherein synthesized source 11
It is positioned at visible-range by such as 20 centre wavelengths and the different LED111 of mutual centre wavelength is formed, control and calculate
Output device 13 can instruct above-mentioned LED111 sequential keyboard encoder and lights one by one, and this image-taking device 12 includes a CCD element (not shown),
And confession arranges the region 15 predetermined to be measured of determinand, and this makes a reservation for region 15 to be measured and includes a plurality of position to be measured 151.
As it was previously stated, by the most different LED111 of above-mentioned 20 centre wavelength, and control its input electric energy respectively, can be easily
It is combined into the light source simulating the distribution of any specific wavelength, standard light source D65 of such as CIE.
Before the actual measurement, the present invention must have a preposition rectification building-out step, please also refer to Fig. 4 flow process
Figure, is arranged on predetermined region to be measured 15 in step 401 by a piece of standard white plate 2, and instructs by controlling and calculate output device 13
Lighting in synthesized source 11 LED111 and irradiate this standard white plate 2, step 402 image-taking device 12 captures each position to be measured
151 pairs should the reflection data of LED111, and output reflection data is to controlling and calculation output device 13, wherein this reflection data
Including, intensity of reflected light and wavelength, step 403 by control and calculate output device 13 judge each LED111 the most by
Individually lighted, and continued to light other if it is not, then return step 401
LED111, until after each LED111 is all lit and image-taking device 12 completes capture the most, controlling in step 404
System and calculation output device 13 calculate a position making each position to be measured 151 reflect light homogenization for each LED111
Compensation information, and control in step 405 and calculate output device 13 according to the luminous intensity of each LED111 and image-taking device 12
Response to each LED111 centre wavelength, calculates one and makes each LED111 luminous intensity simulate a predetermined luminous intensity
The wavelength compensation data of composition, in the present embodiment, using CIE standard light source D65 as the light source of predetermined simulation, later step 406
Control and calculate output device 13 conformity calculation above-mentioned position compensation data and wavelength compensation data, and obtaining each position to be measured
The entire compensation data of 151 corresponding each LED111 reflection datas, finally in step 407 by the extremely storage of this entire compensation data transmission
Cryopreservation device 14 stores.
In this example, by 20 LED111 one-tenth arranged in parallel plane straight illuminated light sources, and the luminous intensity that LED111 is each other is big
Causing equal, predetermined region 15 to be measured is divided into a plurality of position to be measured 151, is that to be separated be 9 positions to be measured in this example
151。
During actual measurement, being placed by determinand on the matrix 152 in predetermined region 15 to be measured, its steps flow chart refer to Fig. 5,
Step 501 is lighted LED111 of plane straight illuminated light source and is irradiated determinand, step by controlling and calculate output device 13 instruction
Rapid 502 to be received this LED illumination by CCD according to position 151 to be measured each in 3X3 matrix to the reflection light on determinand surface and defeated
Going out a corresponding reflection data to controlling and calculation output device 13, step 503 judges by controlling and calculate output device 13
Each LED111 was the most individually lighted, continued to light other LED111 if it is not, then return step 501, until every
After one LED111 is all lit and image-taking device 12 completes capture the most, in step 504 by controlling and calculating output device 13
Extract the entire compensation data in storage device 14, and the reflection data of all LED111 reflection light is entered with entire compensation data
Row compensation operation, wherein aforementioned backoff computing further includes a computing combining CIE color matching function, and exports this determinand
The colourity data on surface.
Thus, at all without the concern for the luminous intensity of each LED own when arranging colorimeter, as long as the compensation fortune of kind rear end
Calculate, the radiation response of similar standard light source of can arranging in pairs or groups out, the threshold of screening light source is greatly reduced；Another aspect, owing to each LED joins
Put and image-taking device the spatial diversity that position is caused is set, it is also possible to easily by rear end compensation operation eliminate so that
Overall colorimetric detection veracity and precision can be substantially improved.
The plane straight illuminated light source of previous embodiment is current modal light source pattern, but light may be caused to be distributed not
Uniform situation, even if can make up by above-mentioned compensation operation, but still has the space that can further improve, therefore this
The second bright embodiment, as shown in Figure 6, synthesized source includes a dome-shaped reflector 3 ', and its reflecting surface is towards predetermined to be measured
Region, and the LED111 of 20 different centre wavelengths1、1112、1113It is arranged in parallel and light emission direction is towards dome-shaped reflector
3 ' are arranged, and image-taking device is then arranged on the open top of dome-shaped reflector 3 ', and determinand 4 ' is arranged on predetermined region to be measured, mat
The LED111 of variant centre wavelength is made by the reflection of dome-shaped reflector 3 ' internal face height, the material of high diffusivity1、1112、1113According to
Penetrate light and reach more preferable light mixing effect, to provide the light evenly changed to irradiate.
The above, only presently preferred embodiments of the present invention, it is impossible to limit the scope that the present invention implements with this, every
The simple equivalence change made according to claims of the present invention and description and modification, all should still belong to patent of the present invention and contain
In the range of lid.
Claims (8)
1. a two-dimentional formula sequential type colorimeter detection method, in order to analyze the color at least one determinand surface and to be converted to color
Degree, wherein this colorimeter has one in order to irradiate the synthesized source on above-mentioned determinand surface, image-taking device, a control
And calculate output device and a storage device；And the most above-mentioned synthesized source includes that a plurality of centre wavelength is positioned at visible ray model
Enclosing and LED that mutual centre wavelength is different, and above-mentioned determinand surface is to be arranged on a predetermined region to be measured, this is predetermined treats
Survey region and be then divided into plural position to be measured, and this storage device stores each above-mentioned position to be measured to each above-mentioned
The reflection of LED and this image-taking device entire compensation data to the response of each above-mentioned centre wavelength, this detection method includes
The following step:
A) each LED of above-mentioned synthesized source is lighted one by one so that it is sequential keyboard encoder exposes to above-mentioned determinand surface；
B) received the reflection on above-mentioned each LED illumination extremely above-mentioned determinand surface according to above-mentioned position to be measured by above-mentioned image-taking device
Light, and export a reflection data；And
C) by above-mentioned control and calculation output device to all above-mentioned reflection light, according to each above-mentioned position to be measured to each photograph
The reflection data of the LED penetrated and above-mentioned entire compensation data compensate computing, and export a corresponding colourity data.
2. detection method as claimed in claim 1, further includes in pretreatment steps front for step a):
D) a piece of standard white plate is arranged on above-mentioned predetermined region to be measured, and lights above-mentioned this standard white of each LED illumination one by one
Plate；
E) each above-mentioned position to be measured reflection data to each above-mentioned LED is recorded；
F) for each above-mentioned LED, a position compensation data making each above-mentioned position to be measured reflection light homogenization is calculated；
G) according to luminous intensity and the response to each above-mentioned LED center wavelength of this image-taking device of each above-mentioned LED, calculate
Go out a wavelength compensation data making above-mentioned LED luminous intensity one predetermined luminous intensity composition of simulation；And
H) conformity calculation above-mentioned position compensation data and wavelength compensation data, it is thus achieved that each above-mentioned position to be measured is to each above-mentioned
This entire compensation data of LED reflection data.
3. detection method as claimed in claim 2, the predetermined luminous intensity composition wherein calculating above-mentioned wavelength compensation data is
Meet the component ratio of CIE standard light source D65.
4. a two-dimentional formula sequential type colorimeter, in order to analyze the color at least one determinand surface and to be converted to colourity, this color
Degree meter has a confession and arranges the region predetermined to be measured on above-mentioned determinand surface, and this makes a reservation for region to be measured and includes a plurality of to be measured
Position, this colorimeter includes:
One in order to irradiate the synthesized source on above-mentioned determinand surface, including a plurality of centre wavelengths be positioned at visible-range and that
The LED that this centre wavelength is different；
One instructs above-mentioned LED sequential keyboard encoder and irradiates control and the calculation output device in above-mentioned predetermined region to be measured one by one；
One receives each above-mentioned position to be measured, above-mentioned determinand surface and is reflected the image-taking device of above-mentioned LED reflection light, and exports
To this control and calculation output device；And
One storage device, stores each above-mentioned position to be measured to the reflection of each above-mentioned LED and this image-taking device to each
The entire compensation data of the response of above-mentioned centre wavelength, exports according to above-mentioned image-taking device for this control and calculation output device
Reflection data and above-mentioned entire compensation data compensate computing, and export a corresponding colourity data.
5. colorimeter as claimed in claim 4, the most above-mentioned synthesized source is that the plane of above-mentioned each LED arranged in parallel is straight
Illuminated light source.
6. colorimeter as claimed in claim 4, the most above-mentioned synthesized source includes that a reflecting surface is towards above-mentioned predetermined to be measured
The dome-shaped reflector in region, and above-mentioned each LED is arranged in parallel and light emission direction is arranged towards above-mentioned dome-shaped reflector.
7. the colorimeter as described in claim 4,5 or 6, the most above-mentioned synthesized source each LED luminous intensity each other is equal.
8. the colorimeter as described in claim 4,5 or 6, the most above-mentioned image-taking device includes one group of charge coupled cell
(Charge-coupled Device,CCD)。
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| CN201310219061.2A CN104215333B (en) | 2013-06-04 | 2013-06-04 | Two dimension formula sequential type colorimeter detection method and this colorimeter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112801216A (en) * | 2021-03-18 | 2021-05-14 | 卡莱特云科技股份有限公司 | Wavelength compensation method and device, computer equipment and storage medium |
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| CN113766128B (en) * | 2021-09-09 | 2023-08-01 | 苏州华兴源创科技股份有限公司 | Image processing apparatus, image processing method, and image forming apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US5021645A (en) * | 1989-07-11 | 1991-06-04 | Eaton Corporation | Photoelectric color sensor for article sorting |
| US5471052A (en) * | 1993-10-25 | 1995-11-28 | Eaton Corporation | Color sensor system using a secondary light receiver |
| DE4434168B4 (en) * | 1994-09-24 | 2004-12-30 | Byk-Gardner Gmbh | Device and method for measuring and evaluating spectral radiation and in particular for measuring and evaluating color properties |
| US7521667B2 (en) * | 2003-06-23 | 2009-04-21 | Advanced Optical Technologies, Llc | Intelligent solid state lighting |
| US8340937B2 (en) * | 2010-05-11 | 2012-12-25 | Xerox Corporation | Characterization of a model-based spectral reflectance sensing device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112801216A (en) * | 2021-03-18 | 2021-05-14 | 卡莱特云科技股份有限公司 | Wavelength compensation method and device, computer equipment and storage medium |
| CN112801216B (en) * | 2021-03-18 | 2021-07-20 | 卡莱特云科技股份有限公司 | Wavelength compensation method and device, computer equipment and storage medium |
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